<!--
 * @Descripttion: 图像裁剪组件
 * @version: 1.0
 * @Author: sakuya
 * @Date: 2021年7月24日17:05:43
 * @LastEditors: Xujianchen
 * @LastEditTime: 2023-03-18 13:04:21
 * @other: 代码完全开源，欢迎参考，也欢迎PR
-->

<template>
  <div class="sc-cropper">
    <div class="sc-cropper__img">
      <img ref="img" :src="src" />
    </div>
    <div class="sc-cropper__preview">
      <h4>图像预览</h4>
      <div ref="preview" class="sc-cropper__preview__img"></div>
    </div>
  </div>
</template>

<script>
import Cropper from 'cropperjs'
import 'cropperjs/dist/cropper.css'

export default {
  props: {
    src: { type: String, default: '' },
    compress: { type: Number, default: 1 },
    aspectRatio: { type: Number, default: NaN },
  },
  data() {
    return {
      crop: null,
    }
  },
  watch: {
    aspectRatio(val) {
      this.crop.setAspectRatio(val)
    },
  },
  mounted() {
    this.init()
  },
  methods: {
    init() {
      this.crop = new Cropper(this.$refs.img, {
        viewMode: 2,
        dragMode: 'move',
        responsive: false,
        aspectRatio: this.aspectRatio,
        preview: this.$refs.preview,
      })
    },
    setAspectRatio(aspectRatio) {
      this.crop.setAspectRatio(aspectRatio)
    },
    getCropData(cb, type = 'image/jpeg') {
      cb(this.crop.getCroppedCanvas().toDataURL(type, this.compress))
    },
    getCropBlob(cb, type = 'image/jpeg') {
      this.crop.getCroppedCanvas().toBlob(
        (blob) => {
          cb(blob)
        },
        type,
        this.compress
      )
    },
    getCropFile(cb, fileName = 'fileName.jpg', type = 'image/jpeg') {
      this.crop.getCroppedCanvas().toBlob(
        (blob) => {
          let file = new File([blob], fileName, { type: type })
          cb(file)
        },
        type,
        this.compress
      )
    },
  },
}
</script>

<style scoped>
.sc-cropper {
  height: 300px;
}

.sc-cropper__img {
  height: 100%;
  width: 400px;
  float: left;
  background: #ebeef5;
}

.sc-cropper__img img {
  display: none;
}

.sc-cropper__preview {
  width: 120px;
  margin-left: 20px;
  float: left;
}

.sc-cropper__preview h4 {
  font-weight: normal;
  font-size: 12px;
  color: #999;
  margin-bottom: 20px;
}

.sc-cropper__preview__img {
  overflow: hidden;
  width: 120px;
  height: 120px;
  border: 1px solid #ebeef5;
}
</style>
